DES MOINES--Newt Gingrich, who came in fourth in the Tuesday Iowa GOP caucus, praised Rick Santorum for waging a "great, positive, campaign," blasted Ron Paul's isolationist foreign policy and slammed Mitt Romney as a "Massachusetts moderate."

Gingrich on Paul, who came in third, according to incomplete returns: "The fact is his views on foreign policy I think are stunningly dangerous for the survival of the United States."

Romney, is in a tie for first with Santorum, with incomplete returns giving an edge to Santorum.

Gingrich on Romney: The race will determine whether the Republican party wants a "Reagan conservative....or do we want a Massachusetts moderate who in fact will be pretty good at managing the decay but has given no evidence in his years in Massachusetts of any ability to change the culture or change the political structure or change the government."